Wall connection for ovens.



` H. GEHNRI'CH, WALL CONNECTION FOR OVENS. PPLICATION FILED JUNE I4|917.

Patented June 4, 1918.

'WALL CONNECTION FOR OVENS.

Application tiled J une 14, 1917. Serial No. 174,797.

To all lwhom it may concern.'

Be it known that I, HERMANN GEHNRIGH, a citizen of the United States,residing at Brooklyn, county of Kings, and State of New York, haveinvented new and useful Improvements in Wall Connections for Ovens, ofwhich the 4following is a specification.

This invention relates to a method of c onnecting the wall sections ofan oven similar to that described in U. S. Patent 835,945

granted to me Nov. 13, 1906.

The present invention is designed to provide a sheet metal joint inwhich the wall sections can be easily litted together and are kept inperfect alinement with each other.

The fundamental object of the invention is to provide one of thesections with a hook member, and a second section with means for slidingcoaction with the hook member. In a construction of this kind when thereis any undue pressure in the oven by the i ition of noxious vapors,the'sliding wall will be displaced and injuryy tov the other walls isaverted.

l The novel features of the invention are more fully described in thefollowing speci- Iication and claims and illustrated in the accompanyingdrawing in which Figure 1 represents a sectional side elevat tion of theupper part of an oven embodying this invention. V

Fig. -2 is a similar section of a portion of tha oven showing the topremoved from the s1 e.v

In this drawing are shown side wall sections a and a top wall section bconnected to the sides. Each section is formed of double walls spacedapart and a filling of asbestos c is arranged to lill the space betweenthe walls to prevent radiation of the heat generated in the oven. l

The side wall section is e uipped with an upwardly extending flan eformed by lapping ,the ends of one wa over the other.

On this extension is fitted a hook or locking member having double shankportions e and f with a loop top to snugly lit over the extension andclasp its sides. This hook formed by looping the lower portion of theshank f and bending it upwardly to parallel the Shanks best seen in Fig.2. A

The top section b has la dependin `lia e portion L formed by lapping thedongle vi'lxll plates. This depending portion is spaced to form achannel z' located between the end of the section and the inner wall ofthe depend'- ing flange. A cushion j can be placed between the top andside sections to give a tight closure to the joint.

As indicated in the drawing, the locking member for connecting the twosections together forms a double reverse hook one portion of which isfirmly clamped tothe extension. When the top is placed onto the side asindicated in Fig. 1, the reverse portion of the hook will engage thechannel in the top section and the depending part of the to will engagethe space between the hook an its shank, thus preventing lateraldisplacement of the top and side. In this'structure when the ases in theoven are accidentally exploded, by the force, while the other Wallsremain intact.

1. A sheet metal joint comprising a wall section havin an extension, ahook member formed wlth a doubled return bent portion fitted on to theextension, said member including a return bent end, and a wall sectionprovided with a flange for coaction with the returny bent end.

2. A sheet metal joint comprising a side wall section having anextension, a hook member formed with a doubled return bent portionfitted on to the extension, said member including a return bent end, anda top wall section having a dependin flange for coaction with the returnbent engl.

3. A sheet metal joint comprising a double Walled side section having anupwardly projecting extension made by lappin the ends of one wall overthe other, a hoo member formed with a doubled return bent portionGEHN'BICH, OF BROOKLYN, NEW YORK, ASSIGNOB TO GEHNRICH INDIRECT f OVENCOMPANY, OF BROOKLYN, NEW YORK, .A CORPORATION OF NEW YORK.

e top wall will be lifted upward mi Laenge? fitted on to the extension,said member inmy hand in the presence of two subscrilbi cluing a. retnrn1109,111', end;i andd a (mble Witnesses. Wa e top sectlon avng a. epening ange made by lapping the ends of one Wall over HERNN GEHNRCH' 5 theother for coaction with the return Ioenl I Wltnesses:

end. WILLIAM n,

In testimony whereof I have hereunto set GRACE DE Von.4

